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Question 1 of 3
Percentage Error = Error x 100 %
Actual Measurement
The sensitivity of the balance is 10 milligrams so the weighing could be out by a maximum of 10 milligrams. Thus "Error" is 10 milligrams.
Percentage Error = 10 x 100 %
240
Percentage Error = 4.16 %
Percentage Error = 4.2 % to 1 dec pl
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Question 2 of 3
- Find the error in weighing.
Error = First Weighing - Accurate Weighing
Error = 925 - 850mg = 75mg - Find the percentage error.
Percentage Error = Error x 100 %
Percentage Error =75 x 100%
Actual Measurement
925
Percentage Error = 8.10%
Percentage Error = 8.1% to 1 dec pl
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Question 3 of 3
-
Find the measured weight of the 5 ml of water.
Measured Weight = (Weight of Measure + Water) - Weight of Measure Measured Weight = 52.165 - 47.345g = 4.820g - The true weight of 5 ml of water is 5 g.
- Find the error in the measurement of the water. Error = True Weight - Measure Weight Error = 5 - 4.820g = 0.180g
- Find the percentage error in weighing.
Percentage Error = Error x 100 %Percentage Error = 0.180 x 100%
Actual Measurement
5
Percentage Error = 3.60%
Percentage Error = 3.6% to 1 dec pl
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